LoadLibraryUnloadTest.java fails with "Too few cleared WeakReferences"

The following test failed in the JDK20 CI:

java/lang/ClassLoader/loadLibraryUnload/LoadLibraryUnloadTest.java

Here's a snippet from the log file:

#section:main
----------messages:(4/204)----------
command: main -Xcheck:jni LoadLibraryUnloadTest
reason: User specified action: run main/othervm/native -Xcheck:jni LoadLibraryUnloadTest
Mode: othervm [/othervm specified]
elapsed time (seconds): 30.295
----------configuration:(0/0)----------
----------System.out:(15/1225)----------
COMMAND: /opt/mach5/mesos/work_dir/jib-master/install/jdk-20+14-879/linux-aarch64.jdk/jdk-20/bin/java -Dtest.classes=/opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S78769/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2b60eee2-a982-4008-9874-cdd81dbc3722/runs/535e1638-b004-48b1-93a2-e009fbde5a99/testoutput/test-support/jtreg_open_test_jdk_tier1_part1/classes/1/java/lang/ClassLoader/loadLibraryUnload/LoadLibraryUnloadTest.d -Djava.library.path=/opt/mach5/mesos/work_dir/jib-master/install/jdk-20+14-879/linux-aarch64.test/jdk/jtreg/native LoadLibraryUnload
[2022-09-01T22:00:13.160548616Z] Gathering output for process 3226617
Native library loaded.
Native library loaded from Class1.
Native library loaded from Class1.
GlobalRef created
GlobalRef deleted
Native library unloaded.
0 dequeued: null
Exception in thread "main" java.lang.RuntimeException: Too few cleared WeakReferences
at jdk.test.lib.Asserts.fail(Asserts.java:594)
at LoadLibraryUnload.main(LoadLibraryUnload.java:170)
Native library loaded in 1 threads
[2022-09-01T22:00:43.343376553Z] Waiting for completion for process 3226617
[2022-09-01T22:00:43.343503273Z] Waiting for completion finished for process 3226617
----------System.err:(13/857)----------
java.lang.RuntimeException: LoadLibraryUnload exit value not zero: expected 0 to equal 1
at jdk.test.lib.Asserts.fail(Asserts.java:594)
at jdk.test.lib.Asserts.assertEquals(Asserts.java:205)
at LoadLibraryUnloadTest.main(LoadLibraryUnloadTest.java:106)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:1589)

JavaTest Message: Test threw exception: java.lang.RuntimeException: LoadLibraryUnload exit value not zero: expected 0 to equal 1